<?php $view->extend('Site1Bundle:Sitetree:layout') ?>

<a href="<?php echo $view['router']->generate('sitetree_create', array('id' => -1)); ?>" target="2">Создать запись в корне</a>

<ul>
<?php foreach($trees as $tree)
    echo $view->render('Site1Bundle:Sitetree:treebit', array('tree' => $tree)); ?>
</ul>